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http://dx.doi.org/10.7842/kigas.2015.19.4.41

Experimental Study on the Performance Characteristics of a Scroll Expander for 1kW-class Organic Rankine Cycle  

Kim, Dokyun (School of Mechanical Engineering, Pusan National University)
Yun, Eunkoo (School of Mechanical Engineering, Pusan National University)
Yoon, Sang Youl (Rolls-Royce University Technology Centre, Pusan National University)
Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Korean Institute of Gas / v.19, no.4, 2015 , pp. 41-48 More about this Journal
Abstract
The performance characteristics of a scroll expander is the most important variable for the performance of organic Rankine cycle system. In this paper, the performance characteristics of a scroll expander was identified using 1kW class organic Rankine cycle system with various operating conditions. The ORC system is composed of an evaporator, a scroll expander, a condenser and a working fluid feed pump that uses R245fa as working fluid. The hot water temperature was controlled from $80^{\circ}C$ to $115^{\circ}C$ by the 50kW-class electric water-heater. The maximum isentropic efficiency of the scroll expander was measured about 77%, and the shaft power was measured from 0.5 kW to 1.8 kW according to heat source temperatures.
Keywords
Performance Test; Organic Rankine Cycle(ORC); Scroll Expander; Low-grade Heat Recovery; Filling factor;
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